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    • 5. 发明授权
    • Method for removing mercury in exhaust gas and system therefor
    • 废气中汞的去除方法及其系统
    • US08703080B2
    • 2014-04-22
    • US12459023
    • 2009-06-25
    • Shintaro HonjoToru TakashinaKozo IidaSusumu OkinoYasuhiro Takeuchi
    • Shintaro HonjoToru TakashinaKozo IidaSusumu OkinoYasuhiro Takeuchi
    • B01D47/00B01D53/46B01D53/56B01D53/86C01B17/00C01B17/74C01B17/48
    • B01D53/501B01D53/8665B01D2257/602F23J15/006F23J2215/60F23J2219/40
    • The present invention provides a method for removing mercury in exhaust gas, in which mercury in exhaust gas discharged from combustion equipment is removed, characterized by including a mercury oxidation process in which mercury in the exhaust gas is converted to mercury chloride in the presence of a catalyst; a contact process in which the exhaust gas is brought into contact with an absorbing solution in a scrubber to absorb and remove mercury components from the exhaust gas; and a control process in which blowing of air or addition of an oxidizing agent into the scrubber is accomplished, and the amount of blown air or the added amount of oxidizing agent is regulated to control the oxidation-reduction potential of the absorbing agent, and a system for removing mercury in exhaust gas. According to the mercury removing method in accordance with the present invention, a phenomenon that mercury chloride is reduced into metallic mercury by SO2 etc. and the metallic mercury scatters in the exhaust gas can be prevented, and mercury in the exhaust gas can be decreased effectively.
    • 本发明提供了一种去除废气中排出的废气中的汞的方法,其中废气中排出的废气中的汞被除去,其特征在于包括一种汞氧化法,其中废气中的汞转化为氯化汞, 催化剂; 接触方法,其中废气与洗涤器中的吸收溶液接触以从废气中吸收和去除汞组分; 以及控制方法,其中完成吹入空气或将氧化剂加入到洗涤器中,并且调节吹入空气量或氧化剂的添加量以控制吸收剂的氧化还原电位,并且 废气中汞去除系统。 根据本发明的水银除去方法,可以防止将二氧化氯还原成金属汞,并且可以防止金属汞在排气中飞散的现象,从而可以有效地降低废气中的汞 。
    • 9. 发明授权
    • Methods for the regeneration of a denitration catalyst
    • 脱硝催化剂再生方法
    • US06395665B2
    • 2002-05-28
    • US09263709
    • 1999-03-05
    • Shigeru NojimaKozo IidaYoshiaki Obayashi
    • Shigeru NojimaKozo IidaYoshiaki Obayashi
    • B01J3864
    • B01J38/60B01D53/8625B01D53/96B01J23/92B01J38/62B01J38/64B01J38/66B01J38/68Y02C20/30
    • This invention provides a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with an aqueous alkaline solution to remove the substances deposited thereon, and subjecting the catalyst to an activation treatment with an aqueous acid solution; a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with a cleaning fluid comprising an aqueous solution containing sulfuric acid or ammonia at a concentration of 0.05 to 20% by weight and maintained at a temperature of 10 to 90°C.; and a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power under the above-described conditions, and impregnating the denitration catalyst with a catalytically active component so as to support it on the catalyst.
    • 本发明提供了一种用于再生脱硝催化剂的方法,其包括用碱性水溶液清洗具有降低的脱硝功率的脱硝催化剂以除去其上沉积的物质,并用酸水溶液进行活化处理; 一种用于再生脱硝催化剂的方法,其包括用包含浓度为0.05至20重量%的硫酸或氨的水溶液的清洁流体清洗具有降低的脱硝功率的脱硝催化剂,并保持在10至 90°C。 以及脱硝催化剂的再生方法,该方法包括在上述条件下清洗具有降低的脱硝功率的脱硝催化剂,并用催化活性组分浸渍脱硝催化剂以便将其支持在催化剂上。
    • 10. 发明授权
    • Nitrogen oxide removal catalyst
    • 氧化氮去除催化剂
    • US5869419A
    • 1999-02-09
    • US871520
    • 1997-06-09
    • Yoshiaki ObayashiKozo IidaShigeru NojimaAtsushi MoriiOsamu Naito
    • Yoshiaki ObayashiKozo IidaShigeru NojimaAtsushi MoriiOsamu Naito
    • B01D53/86B01D53/94B01D53/96B01J23/30B01J37/02B01J38/00B01J23/00B01J8/00B01J23/16
    • B01J38/00B01D53/8628B01D53/8631B01J23/30B01J37/0244
    • This invention effectively utilizes a solid type honeycomb-shaped NO.sub.x removal catalyst which has been used in a catalytic ammonia reduction process and hence reduced in NO.sub.x removal power, and thereby provides an inexpensive catalyst having NO.sub.x removal power equal to that of a fresh catalyst. The nitrogen oxide removal catalyst of this invention, which is useful in a process wherein ammonia is added to exhaust gas and nitrogen oxides present in the exhaust gas are catalytically reduced, has a two-layer structure composed of a lower layer comprising a spent solid type nitrogen oxide removal catalyst and an upper layer comprising a fresh TiO.sub.2 -WO.sub.3 -V.sub.2 O.sub.5 ternary or TiO.sub.2 -WO.sub.3 binary catalyst powder which has been applied to the lower layer so as to give a coating thickness of 100 to 250 .mu.m. Moreover, the catalyst power constituting the upper layer is a catalyst powder obtained by pulverizing a spent solid type nitrogen oxide removal catalyst.
    • 本发明有效地利用了催化氨还原方法中使用的固体型蜂窝状NOx去除催化剂,从而降低了NOx去除能力,从而提供了具有等于新鲜催化剂的NOx去除功率的便宜的催化剂。 本发明的氮氧化物去除催化剂可用于将排放气体中存在氨和排出气体中存在的氮氧化物的方法进行催化还原的方法中,具有由下层构成的二层结构,该下层由废固体型 氮氧化物去除催化剂和上层,其包含新的TiO 2 -WO 3-V 2 O 5三元或TiO 2 -WO 3二元催化剂粉末,其被施加到下层以使涂层厚度为100-250μm。 此外,构成上层的催化剂功率是通过粉碎废固体型氮氧化物去除催化剂而获得的催化剂粉末。